Well, let's just pick my previous statement apart.
If the union is voted in, FXF will go on... check
No job is perfect. Well, if there is one, they must not be hiring.
Bringing the union in will not make FXF perfect. Well, ask any former union shop guy who doesn't want it here. See previous comment.
Another layer of insulation. With the union comes the grievance process. First you need to go to your shop steward (perhaps multiple times) before going above their head...ETC! Check
The last three sentences are my opinion, but I would love for a Teamster rep (not anonymously) to state publicly that they would represent you for free (thus disproving my opinion).
I do not claim that FXF is the perfect job. I do have issues, but it is one of the best jobs out there. If you are that unsatisfied with FXF that you feel you need someone to help you, you probably need more than the union.
If you can show me any fallacies in this argument, then I am not informed!